66884269 has 2 divisors, whose sum is σ = 66884270. Its totient is φ = 66884268.

The previous prime is 66884249. The next prime is 66884327. The reversal of 66884269 is 96248866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38900169 + 27984100 = 6237^2 + 5290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66884269 is a prime.

It is a super-2 number, since 2×66884269² = 8947010879328722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66884249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33442134 + 33442135.

It is an arithmetic number, because the mean of its divisors is an integer number (33442135).

Almost surely, 2^66884269 is an apocalyptic number.

It is an amenable number.

66884269 is a deficient number, since it is larger than the sum of its proper divisors (1).

66884269 is an equidigital number, since it uses as much as digits as its factorization.

66884269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 66884269 is about 8178.2803204586. The cubic root of 66884269 is about 405.9208210271.

The spelling of 66884269 in words is "sixty-six million, eight hundred eighty-four thousand, two hundred sixty-nine".